quiz grades for groupA                          avg
7162-342 18 15  8  2                            13.67
3402-882  0  0  0  0                             0.00
8581-660 25  0  0  0                             8.33
1181-245 25 23 23 25                            24.33
0683-321  7 15 11  6                            11.00
6162-298 25 22  9 23                            23.33
9927-885 24 25 10  0                            19.67
9417-758 24 25  0 17                            22.00
9050-093 25 21 16  6                            20.67
6625-634 19 17 12  4                            16.00
6770-185 24 22 15  4                            20.33
3393-187 24 22 11  4                            19.00
4464-233  0 20  6  8                            11.33
1039-986 24 17  5  2                            15.33
0584-616 25 12 11  6                            16.00
6729-021 15 13 12 18                            15.33
2084-862  0  3  8  4                             5.00
1140-743 23 13 11  6                            15.67
5872-075 24 12  8  8                            14.67
1659-693 25 25 17 17                            22.33
1740-870 14 25 13  2                            17.33
the average was computed with  1 drop